Kara, su altı ve hava FSO sistemlerinin yönelim hatalarıyla deneysel değerlendirmesi

With their high data rate capacity, Free Space Optical (FSO) communication systems can be used for last mile access, backhauling and fiber optic replacement. Terrestrial FSO links are typically installed on building roofs and are prone to building sways due to dynamic wind loads. In Underwater Wireless Optical Communications (UWOC) systems applications, these transmitters can be installed on Unmanned Underwater Vehicles (UUV), seafloor-mounted beacons, and surface buoys; some of which are influenced by environmental factors including sea waves, currents, and winds. In aerial systems, FSO can be installed on Unmanned Aerial Vehicles (UAV) which are subject to aerodynamic disturbances such as wind during flight. Motivated by these trends, we work on developing realistic models for analyzing the behavior and effects of pointing error in FSO systems. We first design and build a 5 Degree Of Freedom (DOF) motion table in order to experimentally generate pointing errors and study its effects. We then work on a realistic modeling of pointing errors in terrestrial FSO links, relating them to the underlying physical phenomena. Towards this end, we use a civil engineering software and conduct extensive simulations to characterize the behavior of various building sizes under wind loads. Secondly we model a UWOC system installed on an ocean buoy. We use an oceanographic marine simulation software to simulate the rotational motions of a realistic ocean buoy with moorings and study its pointing error behavior in the presence of waves and winds. Thirdly we model and simulate the motion behavior of a quadcopter UAV in hovering mode under the impact of wind-induced disturbances. Afterwards we model the pointing error over extended hovering durations under the effects of wind. This study aims to deliver a deeper understanding of FSO systems and fills the gap by providing more realistic models to analyze FSO behavior in the presence of pointing errors.